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为了克服传统PID控制器中微分环节调节困难且难以抑制高频测量噪声信号干扰而导致系统稳定性变差的缺陷,在充分阐述高频信号对传统PID控制器影响机理基础上,通过设计串联低通滤波器,降低了高频信号对控制系统影响,提出了一种低通滤波PID控制器设计方法,并把其应用于所建立的弹性水锤效应水轮机调速系统模型。在MATLAB环境下的仿真结果表明,与传统PI、PID控制器相比,低通滤波PID控制器具有更好的时域和频域性能指标,并且对高频测量噪声扰动不敏感,具有良好的鲁棒性能和抗负荷干扰性能,能满足水轮机调速系统性能指标要求。
In order to overcome the defects of traditional PID controller such as difficult to adjust differential points and difficult to restrain the interference of high-frequency measurement noise signals, the stability of the system is deteriorated. On the basis of fully explaining the influence mechanism of high-frequency signals on traditional PID controllers, Pass filter to reduce the impact of high-frequency signals on the control system. A low-pass filter PID controller design method is proposed and applied to the model of the hydro-hammer hydraulic turbine speed control system. The simulation results in the MATLAB environment show that compared with the traditional PI and PID controllers, the low-pass filter PID controller has better performance in time domain and frequency domain and is insensitive to high-frequency noise disturbance. It has good Robust performance and anti-load interference performance, to meet the performance requirements of hydraulic turbine speed system.